Jan Grahn

Professor at the Department of Microtechnology and Nanoscience, Terahertz and Millimetre Wave Laboratory

In my research, I am exploring the III-V HEMT technology for low-noise microwave amplifiers. The amplifiers are cooled to 5-15 K where the transistors operate even better. We design and fabricate the transistors in the cleanroom at MC2. By measuring DC and RF properties, we can model the transistors and have them to work in cryogenic amplifiers where noise data can be extracted. We have demonstrated several state of the art results in noise up to W-band. A spin-off company from our group has successfully been commercializing the technology in amplifier modules which are now being used in radio telescope arrays and quantum computers all over the word.

I am examiner and lecturer for the course Electrical Circuits and Systems (ESS116)​, Engineering Physics year 2. This course provides the basic foundation for analogue electronic design. For the undergraduate students, it also provides some of the first insights in their education between physics and engineering in electrical science.

​I give a PhD student course bi-annually on High-Speed Devices, in particular focused on transistors in microwave, mm-wave and THz systems including current research in the field. If you are interested in doing this course in your PhD curriculum, feel free to contact me.​

Page manager Published: Thu 11 Nov 2021.